just as the friends and family of one of them, krystle campbell, said their final good-byes. and hundreds gathered on the street to mourn the death of m.i.t. officer sean collier, killed just before thursday night's shoot-out. meanwhile, back here at the hospital, caitlin tells me she's doing so much better. in fact, dan, she says, she pes hospital in the next few days. >> that will be great to see. gio, thank you. that's our coverage of the boston marathon bombing for tonight. >>> now, we turn to texas. where we're learning that the first responders who rushed in to put out the massive fire at the fertilizer plant in the small town of west, they paid a staggering price. much higher than we initially thought. abc's steve osunsami is there tonight. >> reporter: today outside that massive explosion site at that texas fertilizer plant, the local sheriff told us that the first responders who died didn't have a chance. 14 people were killed. and authorities say 12 of them were firefighters and paramedics and other workers who were there trying to put out the initial fire that may